What is "natural depression"

Usage examples of "natural depression".

The Denv ruins were one of the few clusters left on the Noram continent, protected from the worst of the landspouts by the natural depression in which the old city had been built, and by the closeness of the foothills and the mountains behind.

Farther down a channel had been cut into the rock, directing the meager but precious flow across the impermeable stone at the bottom of the cleft into the natural depression of the pool.

A hollow log carried water from the falls to a place where someone had cemented river-stones on the sides of a natural depression in one of those huge sheets of rock.

During the three cold centuries she had lain here, the tidal streams had scoured around her, creating a natural depression on all sides, and heaping silt on to her upper decks as if they were trying to conceal the evidence of an ancient and unforgiven murder.

Krasus settled into a natural depression that acted for him like a huge chair.

It was a natural depression, nearly ideal as a Milan position, though devoid of the top cover that was a basic requirement if you were going after tanks.

But a quick investigation of the site showed that the paddy was a natural depression in the hillside, and the only way it could possibly be drained would be to dig a trench and empty it across the dirt path into the next-lower rice paddy.

It worked on her, as did the strain of these last weeks and the natural depression that followed childbirth.